I've come to a part in a scene that I have to describe a man standing in the center of three large pillars. The pillars have glowing sigils that writhe over their surface. Each pillar has sigils that are a certain color, but the sigils on any given pillar are of different and constantly changing hues of their color. So if one pillar's color theme is red, a gambit of deep dark red to nearly fleshy pink would be possible. These pillars are magical constructs that exist in the mind of the man. They represent magical seals that do various things when released. I'm having trouble with describing the scene in the way I see it in my mind and also with deciding how the 'release' is going to play out. I know other people can't write my material for me - and I certainly don't want them to. I'm curious as to what other writers do when they are having trouble describing something adequately or with ironing out details. I tried various things, even doing a Google images search with keywords like "dark mystical seals" to see if an image would give me some inspiration. Unfortunately, nearly 90% of the results were of the kind of seals found at Sea World.